diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memcontrol.c | 5 | ||||
| -rw-r--r-- | mm/rmap.c | 30 | ||||
| -rw-r--r-- | mm/vmscan.c | 4 |
3 files changed, 31 insertions, 8 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 10833d9..ff7cac6 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -110,6 +110,11 @@ struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p) struct mem_cgroup, css); } +inline struct mem_cgroup *mm_cgroup(struct mm_struct *mm) +{ + return rcu_dereference(mm->mem_cgroup); +} + void mm_init_cgroup(struct mm_struct *mm, struct task_struct *p) { struct mem_cgroup *mem; @@ -302,7 +302,8 @@ out: return referenced; } -static int page_referenced_anon(struct page *page) +static int page_referenced_anon(struct page *page, + struct mem_cgroup *mem_cont) { unsigned int mapcount; struct anon_vma *anon_vma; @@ -315,6 +316,13 @@ static int page_referenced_anon(struct page *page) mapcount = page_mapcount(page); list_for_each_entry(vma, &anon_vma->head, anon_vma_node) { + /* + * If we are reclaiming on behalf of a cgroup, skip + * counting on behalf of references from different + * cgroups + */ + if (mem_cont && (mm_cgroup(vma->vm_mm) != mem_cont)) + continue; referenced += page_referenced_one(page, vma, &mapcount); if (!mapcount) break; @@ -335,7 +343,8 @@ static int page_referenced_anon(struct page *page) * * This function is only called from page_referenced for object-based pages. */ -static int page_referenced_file(struct page *page) +static int page_referenced_file(struct page *page, + struct mem_cgroup *mem_cont) { unsigned int mapcount; struct address_space *mapping = page->mapping; @@ -368,6 +377,13 @@ static int page_referenced_file(struct page *page) mapcount = page_mapcount(page); vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) { + /* + * If we are reclaiming on behalf of a cgroup, skip + * counting on behalf of references from different + * cgroups + */ + if (mem_cont && (mm_cgroup(vma->vm_mm) != mem_cont)) + continue; if ((vma->vm_flags & (VM_LOCKED|VM_MAYSHARE)) == (VM_LOCKED|VM_MAYSHARE)) { referenced++; @@ -390,7 +406,8 @@ static int page_referenced_file(struct page *page) * Quick test_and_clear_referenced for all mappings to a page, * returns the number of ptes which referenced the page. */ -int page_referenced(struct page *page, int is_locked) +int page_referenced(struct page *page, int is_locked, + struct mem_cgroup *mem_cont) { int referenced = 0; @@ -402,14 +419,15 @@ int page_referenced(struct page *page, int is_locked) if (page_mapped(page) && page->mapping) { if (PageAnon(page)) - referenced += page_referenced_anon(page); + referenced += page_referenced_anon(page, mem_cont); else if (is_locked) - referenced += page_referenced_file(page); + referenced += page_referenced_file(page, mem_cont); else if (TestSetPageLocked(page)) referenced++; else { if (page->mapping) - referenced += page_referenced_file(page); + referenced += + page_referenced_file(page, mem_cont); unlock_page(page); } } diff --git a/mm/vmscan.c b/mm/vmscan.c index 7408a8a..215f6a7 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -503,7 +503,7 @@ static unsigned long shrink_page_list(struct list_head *page_list, goto keep_locked; } - referenced = page_referenced(page, 1); + referenced = page_referenced(page, 1, sc->mem_cgroup); /* In active use or really unfreeable? Activate it. */ if (sc->order <= PAGE_ALLOC_COSTLY_ORDER && referenced && page_mapping_inuse(page)) @@ -1057,7 +1057,7 @@ force_reclaim_mapped: if (page_mapped(page)) { if (!reclaim_mapped || (total_swap_pages == 0 && PageAnon(page)) || - page_referenced(page, 0)) { + page_referenced(page, 0, sc->mem_cgroup)) { list_add(&page->lru, &l_active); continue; } |
